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< turn >VERILOG HDL macro definition Define

Macro definition ' DefineRepresents a string with a specified identifier (that is, the name), which is in its general form:' Define identifier (macro name) string (macro content)such as: ' Define signal stringIts function is to specify the identifier signal instead of string, in the process of compiling preprocessing, all the signal after the command is replaced

"C-language summary" macro definition, preprocessing

Macro definition Simple macroFormat: #define Identifier substitution list#define N 100int a[N];//N就是100Macros with parametersFormat: #define identifier (x1, x2, x3,...... xn) Replace list#define MAX(x, y) ((x) > (y) ? (x) : (y))Note: When the program compiles, it will replace the uppercase identifier with the original expression, so the program will increase at compile time.Advantages or DisadvantagesAdvantages① program may be a little faster② Macros

Macro, nested, return instruction

Macro can be used to implement custom directives, by using custom directives, you can define a section of a template fragment as a user instruction, using the macro instruction syntax in the following format:.........In the above format fragment, the following sections are included:The Name:name property specifies the name of the custom directive and can pass in multiple parameters when using a custom direc

(c) Macro __cplusplus C + + mixed programming

Some of the previous contents content as a student, rarely used, may be working to meet a little more, but the first comprehensive study still do not want to have something to fall, although not commonly used but at least have an impressionThen go to the third chapter "Macro __cplusplus"In code written in C and C + +, we often see the following declaration in the header file:#ifdef __cplusplus extern " C " {#endif // some code #ifdef __cplusplus} #

What if Excel can't open a macro?

For example, I want to automatically delete an Excel form after March 2, 2013, and a macro called Macro1 in the table.   Specifically as follows: Sub Macro1 () Private Sub Workbook_Open () Application.DisplayAlerts = False Dim Datee as Date Datee = #3/2/2013# If Date > Datee Then Activeworkbook.changefileaccess xlreadonly Kill Activeworkbook.fullname Thisworkbook.close False End If End Sub But this ma

excel2010 How to record a macro

excel2010 How do I record a macro? Everyone has in the use of excel2010 encountered do not know how to record a macro difficulty? Small make up for you to dispel doubts! 1. First open Excel2010 new worksheet. 2. On the Main Development Tools tab, in the code group, click Record Macro. 3. Pop-up "Record Macro

WHIM-Outlaw macro definition, use another language to do part of the outer package of C + +

Whim:In a language to write C + + plug-in, can replace the macro definition,You can do this by adding specific tags to C + +, such as The middle code can be translated into C + + code and compiled with the C + + compiler.Bothered:1.c++ macro must be anti-slash, and then need a lot of repetitive logic code, the need for macros to reduce the amount of code, to achieve efficient work;2. If there is a large num

Two classic macro definitions under Linux

This article first introduces Linux under the Classic macro definition, feel the wisdom of the geek, and then according to the classic definition for the next blog to pave the groundwork.Offsetof MacroDefinition:Gets the offset of the variable member (MEMBER) of the struct body (TYPE) in this struct. #define OFFSETOF (Type, MEMBER) ((size_t) ((TYPE *) 0)->member)Description: Gets the offset of the variable member (MEMBER) of the struct body (TYPE) in

Introduction to Macro __user Linux

First look at the macro definition of __user: #ifdef __checker__# define __user __attribute__ (Noderef, Address_space (1)) As you can see from the macro definition, the __user macro definition is valid under the condition that you configure the __CHECKER__ macro, and it is obvious that the

"C Language" 15-preprocessing directives--macro definition

directory of this document Introduction to preprocessing Directives One, macro definition without parameters Second, macro definition with parameters Description: This C language topic is the prelude to learning iOS development. And for programmers with an object-oriented language development experience, you can quickly get started with C language. If you don't have programming experie

C language 15-preprocessing directives-macro definition

Introduction to preprocessing Directives One, macro definition without parameters Second, macro definition with parameters Description: This C language topic is the prelude to learning iOS development. And for programmers with an object-oriented language development experience, you can quickly get started with C language. If you don't have programming experience, or are no

Learning Win32 Assembly [34]-macro assembly (1)

I didn't like macros much when I started to use the C language. Code I also have to understand. Macros can be defined in the sourceProgramBut is usually placed before. Data.Some simple macros can be replaced by equ, textequ, OR =, but macros have more complex functions. The essence of "macro" is "Replacement", but it is like "sub-process ";Therefore, there are both macro processes and

C/C ++ macro description

Http://tech.e800.com.cn/articles/2009/727/1248665385863_1.html Many C ++ books advise us that C language macros are the first of all evil, but things are not as bad as we think, just like Goto. MacroA major role is to automatically generateCode. If the template can generate various types of code (type replacement) for us ),In fact, macros can generate new Code (replacement and addition of symbols) on the symbols ). You can find some macro Synt

#springMessage () macro's doubts

#springMessage ("xxx") to deal with internationalization:The way spring handles internationalization can be very special, because this tag can be used.This tag is used only after spring has integrated the velocity template. This template is available in:Org.springframework.web.servlet\src\main\java\org\springframework\web\servlet\view\velocity\spring.vmThe first macro in the velocity template is the springmessage tag, and there are other markers, whic

Print a Excel2007 worksheet using the macro reverse order

In the book or the novel print, you do not set reverse order printing, then the paper will need to be rearranged, because the first page is placed in the bottom, many words obviously not that time to another one of the tune. Here's how to use the macro method to solve Excel table in reverse order printing. Start the Excel table and click View-Macro-to record the macro

_c language based on a macro definition containing if in C

Macro definition that contains if When the macro definition contains an IF 1) define the following macros#define DC (P) if (foo (p)) fun (p) Used in the following environment if (k>n) DC (k); Else DC (n); After the macro is replaced, the following if (k>n) if (foo (k)) Fun (k); Else if (foo (n)) Fun (n); Visible, the original if and else are no longer paired.

M051 latest bspcmsis, self-made GPIO simplified set macro function

Recently, because of the beginning of the real use of the new Tang M051, began to understand the new Tang M0 especially the charm of M051. Learn the official good intentions. Experience the unique charm of m0+51, yes, he is to mess up the 8-bit machine market, the goal is to become and 8051 comparable to the single-chip microcomputer. He did it. Many people in the AVR era, feel that the port alone assignment is inconvenient: for example- Two X LCD ports: Lcd_clk Lcd_dat To pull high and low, a l

The difference between functional macro definition and ordinary function _c language

In C and C + + languages, an identifier is allowed to represent a string, called a macro, which can be a constant, an expression, a string of formatting, and so on. When compiling preprocessing, all occurrences of the "macro name" in the program are substituted with the string in the macro definition, which is called "macro

Macro definition of C Language notes

Macro definition of C Language notes (1) Symbolic Constants Macro definition is a replacement strategy in C language, that is, using preprocessing commands # define equals a string of (lengthy) texts with a name (macro, then you can batch use Macros in the source code. In the preprocessing phase, replace the macro in t

Macro definition of C language notes

(a) Symbolic constantsA macro definition is a substitution policy in C that uses a preprocessing command #define equate a string (lengthy) text with a name (called a macro) and then use the macro in bulk in the source code. In the preprocessing phase, replace the macros in the source code with the original text. For example, in the source code:#define PI 3.14T

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